Casting brass or other copper alloys into metallic molds.



ment of the interior of the mold for the reventing the casting fromuniting Wit the I therefrom after the casting is citizen of the UnitedStates, and a resident of ess I treat the smooth interior of an iron orterior mold-surface to the action of a boronbe the most practical andadvantageous for UNITED STATES PATENT OFFICE.

JOHN E. FOWLER, OF YOUNGSTOWN, OHIO. ASSIGNOR OF'ONE-HALF TO HOWARD H.BECK, OF

YOUNGSTOWN, OHIO.

GASZTING BRASS OR OTHER COPPER ALLOYS INTO- METALLIC MOLDS.

' Specification of Letters Patent.

Patented J 111 1.17, 1906.

Application filed September 5, 1905. Serial No. 276.966.

To all whom it may concern:

Be it known that I, JOHN E. FOWLER, a

Youngstown, county of Mahonin and State of OhlO, have invented a new anuseful Improvement in Processes of Casting Brass or other Copper Alloysinto a Metallic Mold, of

principle of the invention ein herein explained and the best mode in w'ch I have contemplated applying that principle, so as to distinguish itfrom other inventions.

My invention relates to processes of casting molten metal into ametallic mold, and particularly to castin brass or other copper alloysinto a steel'mo d.

My said invention consists of that part or steps of such process whichinvolves the treatception of the molten brass or other copper alloy,hereinafter fully described, and particularly set forth in the claims.The following description sets forth in detail one mode of carrying outthe invention, such disclosed mode constituting but one of various waysin which the principle of the invention may be used.

In'the app ication of my improved procsteel, preferably iron, mold insuch a manner as to prevent any uniting orpenetrating action from takingplace between the molten metal and the iron of the mold, thereb premoldand. permitting its ready separation cool and ready for removal. Ieffect this result by produc ing a covering of borates en the interiorof the mold, and this is done by treating the incompound in dilute liqu1d solution, such as will produce such borates; This solution may beapplied by dipping, washing, or in any desired manner, and I have foundthe use of z dilute liquid solution of bora-cic acid to effeciing therequired action. I have found that this boracic-acid solutionwhen so applied has a great penetrating effect upon the: iron or steel mold andmost thoroughly afl rates do not combine chemically or amalga mate withthe brass or other co per alloys, are indestructible by heat as We 1 asinsoluble, and form an effectual barrier to the union of the mold withthe molten metal. uid form of the applied boracic acid permits acomparatively very small amount thereof to be used, so that the interiorof the mold preserves its smooth hard finish and imparts the samehysical characteristics ofsmoothness to t e casting. In this manner anynumber of castings may be made in the same mold. The castings arecomparatively smooth and require a minimum application of further laborof machining and finishing.

Having thus described my invention in de tal, that which I particularlypoint -out and distinctly claim as my invention is 1. In the process ofcasting brass or other similar copper alloys into a metallic mold, thatstep which consists in subjecting the interior of the mold to thechemical action .ofa compound of boron such as will form borates.

2. In th process of casting brass or other similar copper alloys into ametallic mold,

that step which consists in subjecting the in- I terior of the mold tothe chemical action of boracic acid.

3. In the process of casting brass or similar copper alloys into ametallic mold, that step which consists in subjecting the interior ofthemold to the chemical action of boracic acid in liquid solution.

4. In the recess of casting brass or similar copper a loys into ametallic mold, that step which consists'in subjecting the interior ofthe mold to the chemical action of iboracic' acid in dilute liquidsolution.

Signed by me this 26th day of August,

1905. j JOHN E. FOWLER. Attest:

FRANK L. OESOH, W. B. RANDOLPH.

